Scott_UAT |
(This might be more fitting for the advice section)
According to the rules... yes... kinda.
The are not always balanced in terms abilities that a player character should have, but non-player race creatures are allowed to take class levels. This is probably why hero lab doesn't do it. I'm not a rep from them or anything though so take what I say with a pinch of salt.
If you are looking at doing a player character as one, it might be a smart idea to built it with the Racial Guide.